How well can you run FIFA 14 on a Windows 10 Desktop with 4 GB RAM, AMD Athlon 5350 and no dedicated GPU (only integrated GPU that shares 2GB memory)? And how much of a difference will it make if another 4 GB of RAM is added to this?

MSuhail@ Well your GPU is weak for some game like FIFA Intel Video Cards are not good for games and gaming.
Try too turn off Vertical Sync or Lower resolution. install the latest video card driver.
Test the game in different Settings too !